FRONT FEED RADAR ANTENNA

摘要

The present invention relates to a front feed radar antenna. The antenna comprises a feed, a metamaterial panel, and a reflective panel. The metamaterial panel comprises multiple core layers having identical refractive index distributions. Each core layer comprises multiple metamaterial units. The metamaterial units are provided with a unit substrate having artificial metal microstructures or artificial pore structures. The front feed radar antenna of the present invention changes the pattern of refractive index distribution of the metamaterial panel by designing the shape and arrangement of the metal microstructures within the metamaterial panel, and uses the panel-shaped metamaterial, thus conserving the space of the antenna, improving on the deflection problem of electromagnetic wave at a great incident angle, and improving the efficiency of energy radiation, while at the same time improving the front-and-back ratio of the antenna, thereby providing the antenna with improved directionality.